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Income Tax (Details Textual)	Dec. 31, 2019 USD ($)
Income Tax (Textual)
Net operating loss carryovers	$ 129,879

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- Definition

Net operating loss carryovers.

+ References

No definition available.

+ Details

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Namespace Prefix:	dfns_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Income Tax (Textual).

+ References

No definition available.

+ Details

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Namespace Prefix:	dfns_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration